CN2031175U

CN2031175U - Three-phase ac generator and motor

Info

Publication number: CN2031175U
Application number: CN 87216666
Authority: CN
Inventors: 高孟田
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-15
Filing date: 1987-12-15
Publication date: 1989-01-18

Abstract

The utility model discloses a three-phase ac generator and motor which use the asynchronous motor as the main body and has the function of the electricity generation. As the stator winding has a primary winding and an exciting secondary winding, and the rotor is provided with an exciting winding and an electric drive (rotor cage) winding; the three-phase ac generator and motor can use the network supply as an electric motor, when the power is cut, the three-phase ac generator and motor can use diesels as the power to supply power for the electric equipment like a power generator. The utility model has the advantages of high stability, high efficiency, low cost, and convenient converting; the three-phase ac generator and motor is suitable for urban general enterprises and institutions and the countryside which is lack of water power resource and fire power resource.

Description

Three-phase AC generator and motor

Three-phase alternating current generating, electric dual-purpose machine be a kind of be that main body has the electromechanical equipment that starts function concurrently with the asynchronous motor.

At present, the general enterprises and institutions in the city, unit and rural area be because power shortage, the demand of generator increased day by day, to mend electricity shortage.But common generator performance is single, and is idle during mains supply, and to exist utilization rate low for every price higher (about 900 yuan) in addition, problems such as deficiency in economic performance.

With the motor is that three-phase generation, the electric dual-purpose machine that main body has generator function concurrently is the motor that utilizes mains supply, again can be when having a power failure be used as power and become generator with diesel engine etc., power consumption equipment is powered, the utility model dual-use, the utilization rate height, cost is low, is specially adapted to the rural area of general enterprises and institutions in city and shortage waterpower, firepower resource.

By being equipped with main winding and excitatory pair of winding, its rotor winding is divided into field winding and electronic winding in the stator slot of three-phase alternating current generating, electric dual-purpose machine.The number of turns of every phase main winding is 1/1.73 of the former motor main winding number of turns, and line directly is 1.73 times of former line footpath, and three-phase winding wiring pitch is constant, and " Y " type of employing connects.Excitatory auxiliary winding is a three-phase triple-frequency harmonics winding, every groove 2-20 circle, line directly is 0.6-1.5mm, the cloth string pitch is 1/3 of a main winding, be uniformly distributed in the stator slot, and connect with the rotor field winding through rectification circuit, brush, slip ring, the line of rotor field winding directly for 0.8-1.5mm by every groove 100-1000 circle in the groove of rotor core, the motor winding still is former mouse cage winding.

Accompanying drawing of the present utility model:

Fig. 1 is stator, winding and connection schematic diagram thereof.

Fig. 2 is a stator main winding distribution map.

Fig. 3 is excitatory pair of winding distribution map of stator.

Fig. 4 is a cage rotor slot for winding profile.

Fig. 5 is a rotor field winding distribution map.

J02-51-47.5 kilowatt of motor of The transformation of the way is a most preferred embodiment of the present utility model to, and specific practice is:

Again coiling stator main winding to make every phase winding number of turns be 1/1.73 (every groove 28 circles) of the former motor main winding number of turns, line directly is 1.73 times (φ 1-4mm) in former line footpath, three-phase winding wiring pitch is constant, adopts Y shape to connect, as shown in Figure 2:

2. arrange excitatory pair of winding of three-phase triple-frequency harmonics again by 1/3 main winding pitch on the main winding in stator slot, its line directly is φ 0.8mm, every groove 8 circles, as shown in Figure 3:

3. leave four equidistant dovetail grooves as Fig. 4 on the rotor of the electronic winding of squirrel-cage, each limit size a is 20mm, and b is 35mm, and c is 25mm;

4. be embedded in field winding in rotor, line footpath φ 1.08mm, every groove 450 circles distribute as shown in Figure 5.The electronic winding welding of cut squirrel-cage in the time of will slotting again behind the embedding winding.

5. epitrochanterian field winding leans on slip ring, excitatory pair of winding commutating circuit output UNICOM of brush and stator, as shown in Figure 1.

Three phase AC power generating, electric dual-purpose machine in use advantage are:

1. generating voltage is stable:to be that three-phase triple-frequency harmonics winding accounts for groove area little because the stator of this machine is paid winding, is evenly distributed, and its generating voltage is 380 volts when being used for generating, 13.5 amperes in electric current, and power factor lags behind 0.8,7.5 kilowatts of and generated output is, 6.5 kilowatts of the efficient height. 2. conversion is convenient:need only disconnect this machine of energizing loop and can do the motor use. (because the rotor fluting causes core section to reduce) power is. 3. the transformation of the way and assembling price are low:three phase AC power generating, 7.5 kilowatts of finished product of electric dual-purpose machine both can have been formed by squirrel-cage motor transformations and also can purchase complete loose mail and assemble, about 400 yuan of kludge price, and modified machine only needs about 100 yuan of fee of materials.

Claims

The generating of a kind of three-phase alternating current, electric dual-purpose machine are made of stator and rotor and corresponding windings thereof, it is characterized in that in stator slot by putting main winding and excitatory pair of winding, the rotor winding is divided into field winding and electronic winding, wherein:

The number of turns of the every phase main winding of a is 1/1.73 of the former motor main winding number of turns, and line directly is 1.73 times of former line footpath, and three-phase winding wiring pitch is constant, and the connection of " Y " type of employing,

The excitatory auxiliary winding of b is a three-phase triple-frequency harmonics winding, every groove 2-20 circle, and line directly is 0.6-1.5mm, the cloth string pitch is 1/3 of a main winding, is uniformly distributed in the stator slot, and connects with the rotor field winding through rectification circuit brush, slip ring,

The line of c rotor field winding directly is 0.8-1.5mm, and by every groove 100-1000 circle, in the groove of rotor core, the motor winding still is former mouse cage winding.